The Effectiveness of Short Message Service to Assure the Preparation-to-Colonoscopy Interval before Bowel Preparation for Colonoscopy

Table 4

Univariate analysis of factors associated with satisfactory bowel preparation (Ottawa Scale 0–5).

	Satisfactory preparation ()	Unsatisfactory preparation ()	value
Age, y (range)	53.8 ± 11 (20–77)	56.8 ± 12.1 (25–80)	0.057
Gender (male : female)	82 (44.1) : 104 (55.9)	44 (51.8) : 41 (48.2)	0.240
Intervention using SMS	108 (58.1)	28 (34.6)	<0.001
Body mass index, kg/m^2 (range)	23.5 ± 2.7 (16.0–32.9)	23.1 ± 2.5 (18.4–29.4)	0.175
History of colonoscopy	95 (51.1)	41 (48.2)	0.664
History of abdominal or pelvic surgery	89 (47.8)	27 (31.8)	0.013
Familial history of colon cancer	14 (7.5)	3 (3.5)	0.208
Indication of colonoscopy			0.724
Screening	101 (54.3)	42 (49.4)
Surveillance	27 (14.5)	13 (15.3)
Symptoms	58 (31.2)	30 (35.3)
Chronic comorbid disease
Diabetes	9 (5.9)	6 (7.1)	0.567
Thyroid disease	6 (3.2)	3 (3.5)	0.938
Symptoms
Rectal bleeding	9 (4.8)	3 (3.5)	0.759
Anemia	8 (4.3)	1 (1.2)	0.281
Positive stool occult blood	1 (0.5)	0 (0.0)	0.513
Significant weight loss	1 (0.5)	1 (1.2)	0.530
Abdominal pain/discomfort/bloating	23 (12.4)	25 (29.4)	0.001
Change in bowel habits	2 (1.1)	5 (5.9)	0.033
Diarrhea	8 (4.3)	2 (2.4)	0.729
Constipation	3 (1.6)	2 (2.4)	0.650
Polyp detection rate (%)	75 (40.3)	32 (37.6)	0.996
Adenoma detection rate (%)	57 (30.6)	27 (31.8)	0.587
Compliance with diet instructions	165 (88.7)	63 (74.1)	0.002
≥75% of PEG^* ingested	186 (100)	80 (94.1)	0.001
Mean PC interval^† (h)	5:42 ± 2:02 (1:00–9:50)	6:47 ± 2:04 (2:30–13:00)	<0.001
PC interval 3~5 h	59 (31.7)	16 (18.8)	0.028

Values are mean ± standard deviation or number (% or range).
PEG^*, polyethylene glycol; PC interval^†, preparation-to-colonoscopy interval.